The EyePal is a modern adaptation of the century-old peep sight, which most people relate to as a pin hole sight (remember those pin hole camera experiments back in school?). The EyePal enables you to simultaneously see the target, your front and rear sights all in focus. And since its made out of a static cling material, it can be easily placed on and off of reading, prescription and safety glasses without marring the surface or leaving any residue. Compact, lightweight and virtually indestructable, the EyePal is the ultimate addition to any shooter's kit.